Alfa Laval Corporate Ab

Tomas Kovacs

Fredrik Blomgren

Martin Holm

Helén Gustafsson

The invention refers to a plate heat exchanger where the heat exchanger comprises a first flow channel between a first plate and a second plate, and where the flow channel comprises a lower distribution passage, a heat transfer passage and an upper distribution passage, where the heat transfer passage is vertically divided in a lower and an upper heat transfer passage and where the lower heat transfer passage is horizontally divided in a plurality of adjacent heat transfer zones, where the intermediate angle between the ridges and grooves in any of the heat transfer zones of the lower heat transfer passage is at least 30&#xb0; larger than the intermediate angle of the ridges and grooves of the upper heat transfer passage. The advantage of the invention is that an improved heat exchanger is provided, having an increased thermal performance and an improved evaporation capacity.

Heat exchanger

The invention refers to a plate heat exchanger comprising a first end plate (), a second end plate () and a number of heat exchanger plates (), forming first plate interspaces (I) and second plate interspaces (II), in alternating order. The heat exchanger plates comprise a first outermost plate pair (), a second outermost plate pair () and intermediate plate pairs (). The first end plate and the heat exchanger plates comprise first porthole areas () for first porthole channels () for the formation of inlet and outlet for a first medium to and from the first plate interspaces, and second porthole areas () for the formation of second porthole channels () for inlet and outlet for a second medium to and from the second plate interspaces. The first porthole areas of the heat exchanger plates of the second outermost plate pair form portholes and the second porthole areas of these heat exchanger plates are closed.

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Lund, Sweden

Tomas Kovacs